There have been many times when my kids have stumped me with questions about their surroundings or about how things work or about why things happen. They would ask simple questions like “why do planes fly?” or “why do you have to go to work?” that I had no idea how to answer without displaying my ignorance (about planes) or my frustration (about work). I wish that I had seen any one of the following books at those times; they would have saved me lots stress and my kids would have gotten some answers.